Life Time: Your Body Clock and Its Essential Roles in Good Health and Sleep

"A comprehensive manifesto for living in harmony with our body clocks, penned by someone who has devoted his career to studying them." — Financial Times

Biological clocks are embedded in every aspect of human biology, guiding us toward the prime times of day to sleep, eat, think, and work. Award-winning scientist Russell Foster brings decades of study to this journey through the circadian rhythms that dominate our days and nights. He shows how the realities of 24/seven life—including night-shift work, overbooked calendars, and caring for newborns—disrupt the body clock, taking a toll on sleep and on mental and physical health.

By dismantling long-standing myths and citing cutting-edge science, Foster empowers readers to get back into rhythm and live healthier, sharper lives: scheduling meals to prevent obesity and diabetes; timing medications to increase their effectiveness; getting better sleep through exposure to natural light; and much more. "If you want to embrace life," Foster writes, "then embracing biological time will help you do this."

"A superlative guide to some of the most intriguing questions of human existence." —Bill Bryson, New York Times –bestselling author of A Short History of Nearly Everything

"The clarity of Mr. Foster's spirited prose is welcome, as are his wry humor and contagious sense of wonder." —A. Roger Ekirch, Wall Street Journal